Solve the following equations:
$\left|\begin{array}{ccc}3 x-8 & 3 & 3 \\ 3 & 3 x-8 & 3 \\ 3 & 3 & 3 x-8\end{array}\right|=0$
$\therefore x=\frac{2}{3}$ or $x=\frac{11}{3}$
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